.004 To .008 Is exceptable but .004 to .006 is preferred for all but the dangerous game
cartriges that are crimped (.006 To .008) are preferred so feeding is not a problem
under certain circumstances.
Anything under .004 can be problematic unless you are a very careful re loader.
I went thru that 25 years ago shooting bench rest comp. I would never ever want to turn another neck again especially on a hunting rifle. Way to many things can go wrong.
Mike